Connecting Oracle 11g using Oracle 10g

Question

Hi All,
I have installed Oracle 11g (11gR2) server on a Windows 2003 (win32) machine. It is very well connecting when I tried to login to that database using the below command
sqlplus test/test@oracle11g I tried to access the same server from a different machine where only Oracle 10g client is available. I get the following error.
ERROR:
ORA-12514: TNS:listener does not currently know of service requested in connect
descriptor
Please advice if we can connect Oracle 11g server using a Oracle 10g client from a different machine??
If Yes, Please advice whay am I getting the above error.
Thanks in Advance!!

Answer 1

With respect to your suggestion, I have modified the Oracle 10g tnsnames.ora file as below, but it still throws the same error.
ORACLE11G =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = mildh0105.i-flex.com)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = Oracle11g)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
LISTENER_ORACLE11G =
(ADDRESS = (PROTOCOL = TCP)(HOST = mildh0105.i-flex.com)(PORT = 1521))
the LSNRCTL STATUS is as below...................
C:\Documents and Settings\Administrator>LSNRCTL STATUS
LSNRCTL for 32-bit Windows: Version 11.2.0.1.0 - Production on 14-JUL-2011 12:42
:32
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 11.2.0.1.0 - Produ
ction
Start Date 14-JUL-2011 11:42:29
Uptime 0 days 1 hr. 0 min. 8 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File E:\app\sysfmg\product\11.2.0\dbhome_1\network\admin\li
stener.ora
Listener Log File e:\app\sysfmg\diag\tnslsnr\mildh0105\listener\alert\lo
g.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "Oracle11gXDB" has 1 instance(s).
Instance "oracle11g", status READY, has 1 handler(s) for this service...
Service "oracle11g" has 1 instance(s).
Instance "oracle11g", status READY, has 1 handler(s) for this service...
The command completed successfully
C:\Documents and Settings\Administrator>